{"value"=>"<p>Arranged by topic and then chronologically. Seventy letterbook volumes containing copies of outgoing correspondence from John Shaw Billings and his administrative assistant, Harry M. Lydenberg, in the following categories: Library Matters (31 vols.), Orders (15 vols.), Periodicals (2 vols.), Exchanges (4 vols.), Circulation Dept. (2 vols.), Lenox Library (2 vols.), Correspondence with book dealers: Stechert (4 vols.), Stevens (3 vols.), Terquem (2 vols.), Lemcke & Buechner (1 vol.). The remaining four volumes concern personnel decisions, the construction of the Central Building, and the 1901 experiment of establishing NYPL reading rooms in public schools.</p>"}